Adobe Kulerhttps://kuler.adobe.com/Adobe Kuler
Web-hosted application for generating color themes that can inspire any project.
No matter what you're creating, with Kuler you can experiment quickly with color variations and browse thousands of themes from the Kuler community.

ColorBrowserhttp://code.google.com/p/colorbrowser/ColorBrowser ... allows you to import color palettes you have created elsewhere, create new ones locally, and put as many colors as you like into any you create.

ColourLovershttp://www.colourlovers.com/ColourLovers : ... will let you search the COLOURlovers database for an astonishing 1 million named colors and more than 300,000 user created color palettes.

Colour at the StoryPlace Pre-school Libraryhttp://www.storyplace.org/preschool/other.aspColour (Color) at the StoryPlace Pre-school Library
The StoryPlace Pre-school Library is full of activities for you to explore.
Each one provides a theme, a story, an online activity, a paper-based activity, suggested readings, and a parent activity.

Colorful Languagehttp://www.colourlovers.com/blog/Colorful Language
Obviously, every language has different words for the things we commonly know as ‘milk,’ ‘brother,’ and ‘hair,’ but an interesting difference comes when we start talking about colour. In English, we have orange and pink, which are really ‘light brown’ and ‘light red’ to many other cultures, no different from the light blue with which we label the sky.

Color Vision : Experiment: Color Afterimageshttp://faculty.washington.edu/chudler/eyecol.htmlColor Vision : Experiment: Color Afterimages
Teacher Guide and Student Guide
Students learn some ways to investigate color vision and find out how to plan and conduct their own experiments.
In the "CLASS EXPERIMENT," students discover that afterimages occur because of properties of cells in the retina and because of the way nerve pathways carry color information to the brain. They learn basic facts about photoreceptors, nerve connections, and opponent colors.

Simultaneous contrast http://www.webexhibits.org/colorart/contrast.htmlWhen two colors are laid down side by side, they interact and each color modifies the other. If the two colors complementary, each intensifies the other to the maximum extent possible.

Color in Motionhttp://www.mariaclaudiacortes.com/Interactive art experience investigates the symbolism behind colours and the information that colours can communicate. For each of six basic colours, there is a profile, a movie and a choice of three interactive activities to explore the symbolism behind them.Note that this page uses a 'pop-up'

Visual Acuity and Color Vision Testing Software http://www.littlebitsmultimedia.com/littlebits/html/visiontestsoftware.htmVisual Acuity and Color Vision Testing Software
This pair of vision tests can be utilized to gauge color vision and visual acuity. The tests are easily administered, and can be a quick way to detect issues with vision.
Applications:
- For parents, this may help track visual acuity with your children.
- For teachers, this may help in deciding where to seat students in your classes.
- For remote locations where no other means of vsion testing are available
- For employers where color vision / visual acuity is a consideration for workplace safety/performance

Virtual Kaleidoscope http://www.zefrank.com/dtoy_vs_byokal/Virtual Kaleidoscope
This is fun -- draw and fill in your own designs with the colors of your choice and watch as they are twirled around in the virtual kaleidoscope.
Also instructions on how to build a real Kaleidoscope
colour | color |

Science of Colorshttp://www.surfnetkids.com/colors.htmTo understand the science of colors, we must first know something about the nature of light. Light is an energy source that behaves like a wave. The distance between the each wave is called the wavelength. Light of different wavelengths appear as different colors. Intrigued? Here's where you can learn

Color Mattershttp://www.colormatters.com/Color plays a vitally important role in the world in which we live. Color can sway thinking, change actions, and cause reactions. It can irritate or soothe your eyes, raise your blood pressure or suppress your appetite. When used in the right ways, color can save on energy consumption. When used in the wrong ways, color can contribute to global pollution.

Colour OnLinehttp://cerfkids.com/oncolo.htmActually! Choose and click on an image below. On the new page, you will find an enlarged version of the image and a colour palette. Decide your colour and click on any part of the picture to fill with chosen colour. SIMPLE?